I have just installed the lastest version of Relux and when I create a scene I now seem to have the two black line and two read line across the drawing.

At first I throught it was the internal wall outline and the reference plan, and if I change the offset of the reference plan it move, but the second black line does not, hopefully the screen view will make it clear.

Any suggestions?

Im running Relux on a iMac via VMfusionware and never had any problems like this before.

Seems to be a problem with the graphics card driver. Is Mesa mode activated? If not please do so and check anew. If possible check this also on a "standard" Windows system to rule out any hardware/OS incompatibilities.